Increase the right edge padding to the same amount as the left edge so the text does not run right up against the scrollbar.
Currently, while typing a mail message (HTML format), the text flows almost all the way to the right edge of the window, right up against the scroll bar and it can be hard to see in order to fix any typos in that spot. There needs to be a larger padding programmed into that edge so that text wraps sooner and is more legible while typing.
I think the improper handling of text at the right window edge is just a bug in Outlook. It should have been fixed by quality control a long time ago, and we should not have to waste votes to suggest such things as a feature request :-(